Need help

I am trying to Create a class called Employee. I want to have 4 variables first name (type String), last name (type String), monthly salary (type double), and dependents(type int). ive got to Provide a get and set method for each variable. Then i want to make a method that will determine the annual salary of the employee and call it getAnnualSalary. aFTER THIS I NEED TO BE ABLE TO TEST IT.

any ideas on where to start this and how to do the test deff need help on this im lost as hell